1-(7-Guanyl)-4-(7-guanosinyl)butane 1H-Purinium, 2-amino-7-(4-(2-amino-1,6-dihydro-6-oxo-7H-purin-7-yl)butyl)-6,9-dihydro-6-oxo-9-beta-D-ribofuranosyl- 7-G-7-GB 74746-59-1